If you've heard of an HD upconverter, you're way ahead of most folks. So what's this new addition? What exactly are we trying to "upconvert"? Find out what HD upconverters do and why you might want one.

When the first high-definition television (HDTV) sets hit the market in 1998, movie buffs, sports fans and tech aficionados got pretty excited, and for good reason. Ads for the sets hinted at a television paradise with superior resolution and digital